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War Of Attrition Calculator

Free online war of attrition calculator. Enter your values and get instant results with the formula, step-by-step working, a worked example and FAQs — everything runs locally in your browser on Calcton, no signup required.

中文版:消耗战博弈计算器

War Of Attrition Calculator
参数:奖品价值 V, 单位时间消耗 c, 考察时刻 t(逗号分隔)

原理:消耗战是比谁先撑不住的等待博弈——奖品 V 归坚持到最后者,双方每单位时间各烧成本 c。混合均衡里每方的坚持时长服从指数分布,退出率 λ = c/V,期望坚持 V/c。价值越高、消耗越慢,越值得久等;但任何一方严格随机坚持时,另一方的期望回报恰好为零。

步骤:① 输入奖品价值、单位消耗与考察时刻;② 点击分析;③ 读出退出率、期望时长与对手先退的概率。

示例:V = 100、c = 10、t = 5 时 λ = 0.1、期望坚持 10,对手在 5 单位时间内先退的概率约 0.393469340287。

注意事项:消耗战的期望总成本可能吃掉大半奖品——双方都坚持时是双输,这正是竞价战与专利战的警示模型;均衡假设价值与成本共同知识,价值更高的一方在不对称信息下会坚持更久;本工具给对称情形的混合均衡。

相关:指数分布可用概率计算器复核;重复博弈计算器展示长期互动如何替代消耗;零和博弈计算器给出离散等待的简化版。

How to use the War Of Attrition Calculator

  1. Fill in the inputs with your own numbers — every field shows what it expects.
  2. The result updates instantly as you type; no "Calculate" click needed.
  3. Read the result card for the main figure, the step-by-step formula, and practical notes.

Frequently asked questions

Is the War Of Attrition Calculator free?

Yes — all math calculators on Calcton are free, with no sign-up required. Your inputs are processed in your browser and never sent to a server.

Is there a Chinese version of this tool?

Yes. Use the Chinese version link above — it is the same calculator with the interface in Simplified Chinese.

References

Formulas and benchmarks used by this calculator follow these published sources.

  1. dlmf.nist.gov
  2. mathworld.wolfram.com
Kevin's profile

KevinContent LeadCalcton Editorial Team · Last updated 2026-10-05

Kevin maintains Calcton's formula verification and content: every calculator cites the standard it implements, worked examples are recomputed programmatically, and health benchmarks follow WHO and international guidelines.

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